net/tls: Add support of AES128-CCM based ciphers

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Added support for AES128-CCM based record encryption. AES128-CCM is
similar to AES128-GCM. Both of them have same salt/iv/mac size. The
notable difference between the two is that while invoking AES128-CCM
operation, the salt||nonce (which is passed as IV) has to be prefixed
with a hardcoded value '2'. Further, CCM implementation in kernel
requires IV passed in crypto_aead_request() to be full '16' bytes.
Therefore, the record structure 'struct tls_rec' has been modified to
reserve '16' bytes for IV. This works for both GCM and CCM based cipher.

Signed-off-by: Vakul Garg <vakul.garg@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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Vakul Garg 2019-03-20 02:03:36 +00:00 • committed by David S. Miller

parent 6a23c0a6af

commit f295b3ae9f

4 changed files with 97 additions and 31 deletions

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include/uapi/linux/tls.h

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